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MS Science Midterm Review
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A hypothesis is a reasonable and educated _________.
test scientist guess experiment
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To test a hypothesis, a scientist could conduct a(n) ________.
operation environment experiment inference
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Scientists can organize their observations using ________.
charts graphs tables all of the above
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_________is the application of knowledge learned through science.
Experimenting Technology Testing Observing
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The results of an experiment must be ________.
reproducible kept secret accepted right away not reproducible
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A graph that shows the parts of a whole is a _____
bar graph line graph circle graph or pie chart a curve circle graph
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Which term describes how close measurements are to the correct value?
significant figures accuracy precision estimation
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How many significant figures does the number 26.457 g have?
none of the above
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A change in the identity of a substance that cannot be reversed by physical means is an example of a ________. phase change physical change chemical change none of the above
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___________is anything that has mass and takes up space.
matter length density volume
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The temperature at which a substance changes from a liquid to a gas is called the __________.
freezing point melting point boiling point gas point
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A characteristic that can be observed and measured is called a_____________________.
physical property chemical property flammability mass
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_______________is defined as mass per unit volume.
density grams
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A process that does not change the identity of a substance is called a ______________.
physical property chemical property physical change chemical change
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. The temperature at which a solid becomes a liquid is called the ________________.
melting point freezing point boiling point condensation point
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The amount of material an object has in it is called its __________________.
matter mass volume length
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Which of the following is an example that a chemical change has occurred?
change in state broken pieces smoke change in shape
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What is conserved during any change?
volume mass temperature shape
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An object that sinks when placed in a beaker of water is _______________ water.
more dense than less dense than the same density none of the above more dense than water
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An object has a mass of 40. 0 g and takes up 2. 0 ml
An object has a mass of 40.0 g and takes up 2.0 ml. What is the density of the object? 2.0 g/mL 20.0 g/mL 2.0 kg/cm3 20.0 g/L
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A(n) ___________ is a particle in an atom with a negative charge.
proton neutron isotope electron
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. Isotopes of an element contain different numbers of _______________.
protons neutrons electrons atoms
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An atom of an element with atomic number 6 always has ____________.
six protons in the nucleus six electron clouds more than six neutrons an atomic mass of 6
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Water and carbon dioxide are examples of _______________.
homogenous mixtures elements heterogeneous mixtures compounds
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______________ are small particles that make up most types of matter on Earth.
compounds mixtures atoms elements
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Salad is an example of a(n) ____________________ .
heterogeneous mixture homogeneous mixture compound none of the above
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Salt water is an example of a(n) _____________________________.
chemical compound homogeneous mixture heterogeneous mixture none of the above
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Susan rides her bike 5000 m in 100 seconds
. Susan rides her bike 5000 m in 100 seconds. Her average speed is _______? 5 m/s 5 miles/hour 50 m/s 50 mph
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A dog walks at an average speed of 4 m/s for 60 s
A dog walks at an average speed of 4 m/s for 60 s. How far does the dog walk? 24 m 240 m/s 15 m 240 m
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You are sliding down a ramp at a skate park at a speed of 5 m/s
You are sliding down a ramp at a skate park at a speed of 5 m/s. At the bottom of the ramp your speed increases to 15 m/s over a time of 2 s. Your acceleration is__________? 5 m/s/s 10 m/s/s 30 m/s/s none of the above
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Wood burning chemical popsicle melting physical baking a cake breaking an egg adding sugar to your lemonade
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Distance traveled divided by the time taken to travel that distance equals ______.
average speed acceleration force motion
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The speed of an object at any given moment in time is its _________.
natural speed total speed average speed instantaneous speed
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Change in velocity, divided by the amount of time taken for the change, is ____.
terminal velocity energy acceleration motion
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A push or a pull is _______.
speed acceleration simple machine force
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The rougher the surface, the greater the ______.
gravity friction speed work
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If _____ forces are acting on an object, it will move.
unbalanced balanced friction no
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Inertia of an object is directly related to its _____.
speed mass shape volume
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It would probably be easier to ride a bicycle across ___________.
a sidewalk the grass sand gravel
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According to Newton’s Third Law, forces always occur in ______ pairs.
equal but opposite unequal but complementary unequal but opposite equal but complementary
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A compound machine is a combination of ____________ working together.
wheels simple machines electronic parts none of the above
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What is an example of a simple machine?
scissors ramp car bicycle
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An inclined plane makes doing work easier by__________.
changing the direction of the input force increasing the input force increasing the distance so you can use less force decreasing the input force
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What are the units of work?
Newtons Joules N/s m/s
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How much force is needed to move an object with a mass of 10 kg at an acceleration of 5 m/s2?
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Newton first described gravity while watching ___________.
smoke rise a car accelerate someone walking an apple falling
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